Registry Modification to Hidden File Extension

Title: Registry Modification to Hidden File Extension
Status: test
Description:Hides the file extension through modification of the registry
References:
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1112/T1112.md#atomic-test-1---modify-registry-of-current-user-profile---cmd
  -https://unit42.paloaltonetworks.com/ransomware-families/
  -https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?name=TrojanSpy%3aMSIL%2fHakey.A
Author: frack113
Date: 2022-01-22
modified:2023-08-17
Tags:

• -'attack.persistence'
• -'attack.t1137'

Logsource:

• category: registry_set
• product: windows

Detection:
  selection_HideFileExt:
    TargetObject|endswith: '\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt'
    Details: 'DWORD (0x00000001)'
  selection_Hidden:
    TargetObject|endswith: '\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Hidden'
    Details: 'DWORD (0x00000002)'
  condition:1 of selection_*
Falsepositives:
  -Administrative scripts
Level: medium